My son is 5 and has had high fever for 3 days red blisters, white in the middle, at the back of throat. ?

Dr. can check throat: Throat symptoms can be from a strep throat infection (antibiotics are needed), a cold or influenza (antibiotics usually not used), or from some other cause such as allergies or irritants. Usually, a person sees the doctor if the sore throat is bothersome, coming with high fever, recurrent, or doesn't go away quickly (mainly to check for strep). Throat blisters or ulcers are more likely viral.

Must be seen: and evaluated for possible streptococcal infection. Clinic evaluation today if possible.